The nRM family of nLight recessed mount occupancy sensors provide a range of networked sensor solutions for applications with finished ceilings (e.g. ceiling tiles, sheetrock, plaster). nRM family sensors utilize 100% digital Passive Infrared (PIR) detection and are available with several lens options, providing flexibility for multiple mounting height and coverage pattern requirements. Dual technology occupancy detection can also be added as an option for applications where occupants are stationary for long periods of time. All sensors have integrated on/off photocells as a standard feature, with automatic daylight harvesting/dimming control as an available option. nRM family sensors are powered via the nLight network bus and typically communicate with one or more nLight enabled luminaires (e.g. Lithonia VTLED Series) or nLight relay/dimming packs to enable control of fixtures individually or in groups. Theseconfigurations work standalone and do not require a connection to a larger nLight network. SENSOR OPERATION The sensor detects changes in the infrared energy given off by occupants as they move within the field-of-view. When occupancy is detected the sensor signals other nLight enabled devices to switch connected lighting loads on. Sensors with Passive Dual Technology (PDT) first see motionusing Passive Infrared (PIR) and then engage Microphonics to hear sounds that indicate continued occupancy. This patented technology dynamically adapts a sensor to its environment by filtering out constant background noise and detecting only noises typical of human activity. A factory-set internal time delay of 10 minutes keeps the sensor in the occupied state during brief periods of inactivity. The time delay is reset every time occupancy is re-detected. These sensors require no field calibration or sensitivity adjustments. nLIGHT NETWORKED OPERATION nRM family devices are native nLight devices meaning they are individually addressable and digitally communicate to other nLight devices such as Wallpod switches, relay packs, nLight-enabled digital luminaires, and other sensors. All devices are wired using CAT-5e cabling; creating a local nLight control zone. Once linked to an nLight Gateway, either directly or via an nLight network backbone, the zone becomes capable of remote status monitoring, configuration, and control with nLight SensorView software.